Change your FTP port number to increase security and prevent port blockingFTP stands for File Transfer Protocol. Moreover, a TCP-based network, such as the Internet, uses the FTP (File Move Protocol). To prevent network security threats and to identify the services they are running using Nmap is important.

A standard network protocol to move files from one host to another. When two computers are attempting to communicate, FTP creates two connections between them.

One channel handles the data transfer, and the other is utilized to convey requests. Answers back between the two customers. If you want to understand How to Open a Port on Linux please consider this.

Several examples can considered as the management “send”, “get”, “transfer”, and change directories. The proxy servers or computer servers use these four commands, during an FTP trade.

FTP Port Number: Let’s Understand in Detail

FTP uses a data port in addition to a control port to transport files from the client to the server. Depending on the type of data transfer being used, the data port number may change.

The FTP server establishes a port and waits for a client to connect to it when it is in active mode. The client establishes a connection to the port. Once receiving the data transfer port number over the control connection. This implies that the FTP server chooses the data port number.

Importance of FTP Port Number

As it is necessary for establishing a connection between a client and server via FTP. Understanding the FTP port number is crucial. One of the first things to check is if you are having problems. Is connecting to an FTP server whether you are using the right port number?

A port number is similar to a mailbox number that routes incoming data to a certain computer program. Data is first divided into packets before being transferred over the internet.  Afterward, each packet is marked with the correct port number to make sure it is sent. Here you will understand what is the port number.

Types of Port Numbers:

FTP uses two types of ports mostly which we will understand below.

Control Port:  The control port is used to connect the client and server for the first time. To communicate control data For the control connection, the default FTP port number is 21. The usage of port 21 as the standard FTP port number is not required. Yet, FTP servers may be set up to use an alternative port number for the control connection.

Data Port: File transfers between the client and server take place across the data port. Both the active mode and the passive mode of data transfer are used by FTP. Use distinct methods for obtaining the data port number.

Here are Some of the Features of FTP Port Numbers:

  • The FTP Port Number transfers Files between computers using the FTP Port Number.
  • 21 is the standard FTP port number.
  • Changes to the FTP port number are possible.
  • Change your FTP port number to increase security and prevent port blocking
  • Depending on the kind of FTP server you’re using, the configuration file’s location may change.
  • You must restart your FTP server after changing the FTP port number.

Frequently Asked Questions

Q1. What Port Does FTP Use?

Ports 21 and 20 are using FTP (File Transfer Protocol) for the control and data connections. The connection between the client and server. The transmission of commands from the client to the server is established via port 21.

The actual data transfer between the client and server takes place over port 20. In contrast, while using passive mode FTP client starts both connections. Then server replies on a random high port number.

Q2. What is the FTP Port Number?

The FTP port number 21 makes the control connection between a client and a server. Which enables connection establishment and command transmission. It is an established port for using the FTP protocol.

Although passive mode allows the server to use a random high port number. Port 20 continues to be used for data transfer via FTP. For setting up FTP connections and effective files one needs to understand FTPS port Numbers.

Q3. What is an FTP Server?

A computer program is known as an FTP (File Transfer Protocol) server. And enables users to send and receive files via the Internet using the FTP protocol. To transfer files, the FTP server first establishes a connection with FTP clients. By listening to their incoming connection requests.

Businesses and organizations use FTP servers for file sharing. Besides that also for backup archiving and website hosting. If computers are linked to the same network or spread over different regions of the internet. They offer a safe and effective means to dispatch huge data between them.

Final Thoughts on FTP Port Number

To establish a connection between the client and the server, FTP ports are necessary. Make sure that your FTP is listening on the correct port. Otherwise, connecting to the server can be too difficult. FTP creates two connections: one for command transmission and the other for data transmission.

The data connection uses FTP port 20. The default FTP port number for the control connection is 21. To ensure security or avoid network congestion on ports 20 and 21, you can change the default FTP port.

Frequently Asked Questions (FAQ)

1. What is the default FTP port number?

Port 21, is the default FTP port Number. Port 21 is the standard port basically for ideal associations in FTP clients and servers.

2. What’s the difference between Port 20 and Port 21 in FTP?

Port 20: Basically for Data Channel, It’s used in active FTP mode to transfer data between client and server.

Port 21: It’s basically for the Control Channel, Sending FTP commands and receiving the responses.